Brain and Cognitive Health Archive

Seasonal affective disorder (SAD), a type of depression that begins in late fall and early winter, is caused by lack of sunlight exposure. Common symptoms of SAD include lack of sexual energy, overeating, problems sleeping, and social withdrawal. SAD is also associated with impaired cognitive function. Getting more sunlight from being outdoors or sitting in front of a sunlit window helps stimulate the brain's 24-hour sleep-wake clock. Taking antidepressants and using light therapy (which involves sitting in front of a light box) also can help manage SAD.

Older adults who take medications to lower their blood pressure may reduce their risk of dementia, according to a 2023 study. The finding reinforces the connection between heart and brain health.

Semaglutide (Ozempic, Wegovy), which mimics a natural hormone called GLP-1, has become a popular obesity drug because it promotes dramatic weight loss. New evidence suggests this drug and others like it may also curb compulsions for things other than food. The drugs may also dampen cravings for alcohol, smoking, gambling, and excessive shopping by hampering activation of the brain's reward pathways. If further research confirms preliminary findings, the demand for GLP-1 drugs is likely to increase.

People who are sedentary more than 10 hours per day may have a higher risk of later developing dementia than those who spend less time being inactive, according to a 2023 study.

Both loneliness and isolation were associated with poor health outcomes in a 2023 study. However, social isolation was a stronger predictor of physical decline and early death, while loneliness was more predictive of mental health issues such as depression.

Navigating whether or when an older person should limit or stop driving is tricky. Whether these concerns are about a family member or yourself, it's helpful to be aware of red flags and to understand how driving abilities –– and risk for motor vehicle accidents –– change with age.

Mnemonics are techniques for recalling information. One type of mnemonic is called "look, snap, connect," which uses visualization, word association, and storytelling to help solidify a memory so people can recall it later.

A 2023 study suggests using hearing aids may reduce the risk of cognitive decline, especially in older adults with the highest risk of developing severe cognitive impairment.

In a 2023 study, among people age 50 or 60 who reported high rates of exercise, those who said they slept less than six hours per night had faster rates of cognitive decline over the next 10 years than those who said they got six to eight hours of sleep per night.

Memory loss is a pervasive worry. Dementia will affect an estimated nine million Americans by 2030 and 12 million by 2040. A 2023 study suggests six healthy lifestyle factors can significantly slow memory decline: eating a healthy diet, exercising regularly, not smoking, not drinking alcohol, being socially active, and engaging in brain-challenging activities. Another 2023 study suggests regular Internet use may be linked to a lower risk of dementia.